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prisoha [69]
3 years ago
10

If a number is positive, then it’s square is positive

Mathematics
2 answers:
8_murik_8 [283]3 years ago
5 0
Yes.
+ x + = +
- x + = -
- x - = +
NNADVOKAT [17]3 years ago
3 0

Answer:

Yes, because of the fact that (+)(+)=+, but (-)(+)=-

Step-by-step explanation:

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What's is 2/9 divide 2/3
avanturin [10]
The answer is 1/3 or 0.3333
8 0
3 years ago
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Using the quadratic formula to solve x2 = 5 - X, what are the values of X?
sdas [7]

Answer:

The answer is

<h3>x =  \frac{ - 1 +  \sqrt{21} }{2}  \:  \:  \: or \:  \:  \: x =  \frac{ - 1 -  \sqrt{21} }{2}</h3>

Step-by-step explanation:

x² + x - 5 = 0

Using the quadratic formula

That's

<h3>x =  \frac{  - b\pm \sqrt{ {b}^{2} - 4ac } }{2a}</h3>

From the question

a = 1 , b = 1 , c = - 5

Substitute the values into the above formula and solve

We have

<h3>x =  \frac{ - 1\pm \sqrt{ {1}^{2} - 4(1)( - 5) } }{2(1)}  \\ x =  \frac{ - 1\pm \sqrt{1  + 20 } }{2}  \\ x =   \frac{ - 1\pm \sqrt{21} }{2}</h3>

We have the final answer as

<h3>x =  \frac{ - 1 +  \sqrt{21} }{2}  \:  \:  \: or \:  \:  \: x =  \frac{ - 1 -  \sqrt{21} }{2}</h3>

Hope this helps you

3 0
3 years ago
Find the slope of the line through the points (−3, 1) and (−1, 5)<br> PLZZZ HELPPPP
snow_tiger [21]

Answer:

2

Step-by-step explanation:

We can find the slope using the formula

m = ( y2-y1)/(x2-x1)

   = ( 5-1)/( -1 - -3)

   = ( 5-1)/( -1+3)

   = 4/2

   = 2

6 0
3 years ago
Will give BRAINLIEST! For parametric equations x= a cos t and y= b sin t, describe how the values of a and b determine which con
irga5000 [103]
The a and b determine how big or small the shape of the conic section is. 
<span>For the different conic sections given through the equations </span>
<span>Circle: x^2/a^2 + y^2/a^2=1 </span>
<span>Ellipse: x^2/b^2+y^2/a^2 = 1 </span>
<span>Hyperbola: x^2/a^2 - y^2/b^2 = 1 </span>
<span>When trying to isolate cos and sin from those equations to get cos^2t + sin^2 t = 1 you can determine the conic section when substituting cos t = x/a and sint = y/b into cos^2t+sin^2t square it and then refer to the conic section equations to determine the conic section. x defines the major axis and y is the minor axis. a and b provide the coordinate pairs</span>
3 0
3 years ago
Read 2 more answers
Y<br><img src="https://tex.z-dn.net/?f=y2%20%2B%20%20%5Cfrac%7B4%7D%7By%7D%20%20%3D%202%20%5C%5C%20" id="TexFormula1" title="y2
MAVERICK [17]

Answer:

{y}^{2}  +  \frac{4}{y}  = 2 \\  {y}^{3}  + 4 = 2y \\  {y}^{3}  - 2y + 4 = 0 \\ y =  - 2, \:  \: \:  \: 1 + i

5 0
3 years ago
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